X-Git-Url: http://git.ipfire.org/?p=people%2Fpmueller%2Fipfire-2.x.git;a=blobdiff_plain;f=src%2Fdracut%2Fswitch_root.c;fp=src%2Fdracut%2Fswitch_root.c;h=0000000000000000000000000000000000000000;hp=1520387239e1d8d0ac797f57ae08d474be4a7e8d;hb=fd3b60d89e24a60d89cfd9153ceedaac0d959f6c;hpb=a4d36b4a3f3f8cdab5f83c91114091721d9e050b

diff --git a/src/dracut/switch_root.c b/src/dracut/switch_root.c
deleted file mode 100644
index 1520387239..0000000000
--- a/src/dracut/switch_root.c
+++ /dev/null
@@ -1,188 +0,0 @@
-/*
- * switchroot.c - switch to new root directory and start init.
- *
- * Copyright 2002-2008 Red Hat, Inc.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors:
- *	Peter Jones <pjones@redhat.com>
- *	Jeremy Katz <katzj@redhat.com>
- */
-#include <sys/mount.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/param.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <ctype.h>
-#include <dirent.h>
-
-#ifndef MS_MOVE
-#define MS_MOVE 8192
-#endif
-
-enum {
-	ok,
-	err_no_directory,
-	err_usage,
-};
-
-/* remove all files/directories below dirName -- don't cross mountpoints */
-static int
-recursiveRemove(char * dirName)
-{
-	struct stat sb,rb;
-	DIR * dir;
-	struct dirent * d;
-	char * strBuf = alloca(strlen(dirName) + 1024);
-
-	if (!(dir = opendir(dirName))) {
-		printf("error opening %s: %m\n", dirName);
-		return 0;
-	}
-
-	if (fstat(dirfd(dir),&rb)) {
-		printf("unable to stat %s: %m\n", dirName);
-		closedir(dir);
-		return 0;
-	}
-
-	errno = 0;
-
-	while ((d = readdir(dir))) {
-		errno = 0;
-
-		if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, "..")) {
-			errno = 0;
-			continue;
-		}
-
-		strcpy(strBuf, dirName);
-		strcat(strBuf, "/");
-		strcat(strBuf, d->d_name);
-
-		if (lstat(strBuf, &sb)) {
-			printf("failed to stat %s: %m\n", strBuf);
-			errno = 0;
-			continue;
-		}
-
-		/* only descend into subdirectories if device is same as dir */
-		if (S_ISDIR(sb.st_mode)) {
-			if (sb.st_dev == rb.st_dev) {
-				recursiveRemove(strBuf);
-				if (rmdir(strBuf))
-					printf("failed to rmdir %s: %m\n", strBuf);
-			}
-			errno = 0;
-			continue;
-		}
-		if (unlink(strBuf)) {
-			printf("failed to remove %s: %m\n", strBuf);
-			errno = 0;
-			continue;
-		}
-	}
-
-	if (errno) {
-		closedir(dir);
-		printf("error reading from %s: %m\n", dirName);
-		return 1;
-	}
-
-	closedir(dir);
-	return 0;
-}
-
-static int switchroot(const char *newroot)
-{
-	/*  Don't try to unmount the old "/", there's no way to do it. */
-	const char *umounts[] = { "/dev", "/proc", "/sys", NULL };
-	int errnum;
-	int i;
-
-	for (i = 0; umounts[i] != NULL; i++) {
-		char newmount[PATH_MAX];
-		strcpy(newmount, newroot);
-		strcat(newmount, umounts[i]);
-		if (mount(umounts[i], newmount, NULL, MS_MOVE, NULL) < 0) {
-			fprintf(stderr, "Error mount moving old %s %s %m\n",
-				umounts[i], newmount);
-			fprintf(stderr, "Forcing unmount of %s\n", umounts[i]);
-			umount2(umounts[i], MNT_FORCE);
-		}
-	}
-
-	if (chdir(newroot) < 0) {
-		errnum=errno;
-		fprintf(stderr, "switchroot: chdir failed: %m\n");
-		errno=errnum;
-		return -1;
-	}
-	recursiveRemove("/");
-	if (mount(newroot, "/", NULL, MS_MOVE, NULL) < 0) {
-		errnum = errno;
-		fprintf(stderr, "switchroot: mount failed: %m\n");
-		errno = errnum;
-		return -1;
-	}
-
-	if (chroot(".")) {
-		errnum = errno;
-		fprintf(stderr, "switchroot: chroot failed: %m\n");
-		errno = errnum;
-		return -2;
-	}
-	return 1;
-}
-
-static void usage(FILE *output)
-{
-	fprintf(output, "usage: switchroot <newrootdir> <init> <args to init>\n");
-	if (output == stderr)
-		exit(err_usage);
-	exit(ok);
-}
-
-int main(int argc, char *argv[])
-{
-	char *newroot = argv[1];
-	char *init = argv[2];
-	char **initargs = &argv[2];
-
-	if (newroot == NULL || newroot[0] == '\0' ||
-	    init == NULL || init[0] == '\0' ) {
-		usage(stderr);
-	}
-
-	if (switchroot(newroot) < 0) {
-		fprintf(stderr, "switchroot has failed.  Sorry.\n");
-		return 1;
-	}
-	if (access(initargs[0], X_OK))
-		fprintf(stderr, "WARNING: can't access %s\n", initargs[0]);
-
-	/* get session leader */
-	setsid();
-	/* set controlling terminal */
-	ioctl (0, TIOCSCTTY, 1);
-
-	execv(initargs[0], initargs);
-}
-